Redox conditions in sediments and during sedimentation in the Ontong Java Plateau, west equatorial Pacific
Redox-sensitive elements in sediments, such as manganese (Mn), vanadium (V), molybdenum (Mo), and uranium (U), are promising indicators of past redox conditions during sedimentation and early diagenesis. However, in the Ontong Java Plateau, west equatorial Pacific, there are sparse datasets of redox...
Published in: | Chinese Journal of Oceanology and Limnology |
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2011
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Online Access: | http://ir.qdio.ac.cn/handle/337002/11524 https://doi.org/10.1007/s00343-011-1027-1 |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/11523 2023-05-15T13:40:36+02:00 Redox conditions in sediments and during sedimentation in the Ontong Java Plateau, west equatorial Pacific Lu Bo Li Tiegang Yu Xinke Chang Fengming Nan Qingyun Li, TG (reprint author), Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China 2011-11-01 http://ir.qdio.ac.cn/handle/337002/11524 https://doi.org/10.1007/s00343-011-1027-1 英语 eng CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY Lu Bo; Li Tiegang; Yu Xinke; Chang Fengming; Nan Qingyun.Redox conditions in sediments and during sedimentation in the Ontong Java Plateau, west equatorial Pacific,CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2011,29(6):1309-1324 http://ir.qdio.ac.cn/handle/337002/11524 doi:10.1007/s00343-011-1027-1 West Equatorial Pacific Ontong Java Plateau Sediment Redox-sensitive Elements Marine & Freshwater Biology Oceanography Article 期刊论文 2011 ftchinacasciocas https://doi.org/10.1007/s00343-011-1027-1 2022-06-27T05:34:10Z Redox-sensitive elements in sediments, such as manganese (Mn), vanadium (V), molybdenum (Mo), and uranium (U), are promising indicators of past redox conditions during sedimentation and early diagenesis. However, in the Ontong Java Plateau, west equatorial Pacific, there are sparse datasets of redox-sensitive elements in sediment cores. Here, we present a 250 ka record of redox sensitive elements from a 460 cm gravity core at site WP7 (3 degrees 56'S, 156 degrees E, water depth 1 800 m), which was recovered from the southwest Ontong Java Plateau during the 1993 cruise of R/V Science I of the Institute of Oceanology, Chinese Academy of Sciences (IOCAS). Relative to the Post-Archean Australian Shale (PAAS), authigenic Mn, cobalt (Co), nickel (Ni), Mo, V, U, and cadmium (Cd) were found at constantly low levels except when peaks occurred at several depth intervals. Manganese, Co, Ni, and Mo concentrations were elevated at 25-35 cm due to Mn redox cycling. The core was divided into three distinct sections, the top 0-25 cm being oxic, a suboxic section at 25-35 cm and from 35-460 cm which was anoxic. Differential authigenic enrichments of Co, Ni, Mo, V, U, and Cd at the same depth intervals were observed indicating that the enrichments happened during sedimentation or diagenesis and suffered no post settlement redox changes. Therefore, no significant changes in redox conditions during sedimentation must have happened. The water at depth on the Ontong Java Plateau during past 250 ka must have been well oxygenated, possibly resulted from the more or less continuous presence of oxygen-rich deep water like the modern Antarctic Intermediate Water (AAIW) and Antarctic Circumpolar Water (ACW); while it's slightly less oxygenated in glacial intervals, possibly due to ventilation weakening and/or the surface productivity increase. Redox-sensitive elements in sediments, such as manganese (Mn), vanadium (V), molybdenum (Mo), and uranium (U), are promising indicators of past redox conditions during sedimentation and early ... Article in Journal/Newspaper Antarc* Antarctic Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Antarctic Pacific Chinese Journal of Oceanology and Limnology 29 6 1309 1324 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
West Equatorial Pacific Ontong Java Plateau Sediment Redox-sensitive Elements Marine & Freshwater Biology Oceanography |
spellingShingle |
West Equatorial Pacific Ontong Java Plateau Sediment Redox-sensitive Elements Marine & Freshwater Biology Oceanography Lu Bo Li Tiegang Yu Xinke Chang Fengming Nan Qingyun Li, TG (reprint author), Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China Redox conditions in sediments and during sedimentation in the Ontong Java Plateau, west equatorial Pacific |
topic_facet |
West Equatorial Pacific Ontong Java Plateau Sediment Redox-sensitive Elements Marine & Freshwater Biology Oceanography |
description |
Redox-sensitive elements in sediments, such as manganese (Mn), vanadium (V), molybdenum (Mo), and uranium (U), are promising indicators of past redox conditions during sedimentation and early diagenesis. However, in the Ontong Java Plateau, west equatorial Pacific, there are sparse datasets of redox-sensitive elements in sediment cores. Here, we present a 250 ka record of redox sensitive elements from a 460 cm gravity core at site WP7 (3 degrees 56'S, 156 degrees E, water depth 1 800 m), which was recovered from the southwest Ontong Java Plateau during the 1993 cruise of R/V Science I of the Institute of Oceanology, Chinese Academy of Sciences (IOCAS). Relative to the Post-Archean Australian Shale (PAAS), authigenic Mn, cobalt (Co), nickel (Ni), Mo, V, U, and cadmium (Cd) were found at constantly low levels except when peaks occurred at several depth intervals. Manganese, Co, Ni, and Mo concentrations were elevated at 25-35 cm due to Mn redox cycling. The core was divided into three distinct sections, the top 0-25 cm being oxic, a suboxic section at 25-35 cm and from 35-460 cm which was anoxic. Differential authigenic enrichments of Co, Ni, Mo, V, U, and Cd at the same depth intervals were observed indicating that the enrichments happened during sedimentation or diagenesis and suffered no post settlement redox changes. Therefore, no significant changes in redox conditions during sedimentation must have happened. The water at depth on the Ontong Java Plateau during past 250 ka must have been well oxygenated, possibly resulted from the more or less continuous presence of oxygen-rich deep water like the modern Antarctic Intermediate Water (AAIW) and Antarctic Circumpolar Water (ACW); while it's slightly less oxygenated in glacial intervals, possibly due to ventilation weakening and/or the surface productivity increase. Redox-sensitive elements in sediments, such as manganese (Mn), vanadium (V), molybdenum (Mo), and uranium (U), are promising indicators of past redox conditions during sedimentation and early ... |
format |
Article in Journal/Newspaper |
author |
Lu Bo Li Tiegang Yu Xinke Chang Fengming Nan Qingyun Li, TG (reprint author), Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China |
author_facet |
Lu Bo Li Tiegang Yu Xinke Chang Fengming Nan Qingyun Li, TG (reprint author), Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China |
author_sort |
Lu Bo |
title |
Redox conditions in sediments and during sedimentation in the Ontong Java Plateau, west equatorial Pacific |
title_short |
Redox conditions in sediments and during sedimentation in the Ontong Java Plateau, west equatorial Pacific |
title_full |
Redox conditions in sediments and during sedimentation in the Ontong Java Plateau, west equatorial Pacific |
title_fullStr |
Redox conditions in sediments and during sedimentation in the Ontong Java Plateau, west equatorial Pacific |
title_full_unstemmed |
Redox conditions in sediments and during sedimentation in the Ontong Java Plateau, west equatorial Pacific |
title_sort |
redox conditions in sediments and during sedimentation in the ontong java plateau, west equatorial pacific |
publishDate |
2011 |
url |
http://ir.qdio.ac.cn/handle/337002/11524 https://doi.org/10.1007/s00343-011-1027-1 |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY Lu Bo; Li Tiegang; Yu Xinke; Chang Fengming; Nan Qingyun.Redox conditions in sediments and during sedimentation in the Ontong Java Plateau, west equatorial Pacific,CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2011,29(6):1309-1324 http://ir.qdio.ac.cn/handle/337002/11524 doi:10.1007/s00343-011-1027-1 |
op_doi |
https://doi.org/10.1007/s00343-011-1027-1 |
container_title |
Chinese Journal of Oceanology and Limnology |
container_volume |
29 |
container_issue |
6 |
container_start_page |
1309 |
op_container_end_page |
1324 |
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1766137488986865664 |